<html lang="en"><head><meta charset="UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><title>Asymptotics · IntU.jl</title><meta name="title" content="Asymptotics · IntU.jl"/><meta property="og:title" content="Asymptotics · IntU.jl"/><meta property="twitter:title" content="Asymptotics · IntU.jl"/><meta name="description" content="Documentation for IntU.jl."/><meta property="og:description" content="Documentation for IntU.jl."/><meta property="twitter:description" content="Documentation for IntU.jl."/><meta property="og:url" content="https://iitis.github.io/IntU.jl/asymptotic/"/><meta property="twitter:url" content="https://iitis.github.io/IntU.jl/asymptotic/"/><link rel="canonical" href="https://iitis.github.io/IntU.jl/asymptotic/"/><script data-outdated-warner src="../assets/warner.js"></script><link href="https://cdnjs.cloudflare.com/ajax/libs/lato-font/3.0.0/css/lato-font.min.css" rel="stylesheet" type="text/css"/><link 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id="Asymptotic-Expansions-1"></a><a class="docs-heading-anchor-permalink" href="#Asymptotic-Expansions" title="Permalink"></a></h1><p>For large Hilbert space dimension <span>$d$</span>, exact Weingarten results can be complicated rational functions. IntU.jl provides utilities to expand these results as a Taylor series in <span>$1/d$</span>.</p><h2 id="Usage"><a class="docs-heading-anchor" href="#Usage">Usage</a><a id="Usage-1"></a><a class="docs-heading-anchor-permalink" href="#Usage" title="Permalink"></a></h2><pre><code class="language-julia hljs">asymptotic(expr, measure, order=1)</code></pre><ul><li><strong>expr</strong>: The symbolic expression to integrate.</li><li><strong>measure</strong>: The integration measure (Haar, PureState, GinUE, etc.).</li><li><strong>order</strong>: The maximum power of <span>$1/d$</span> to retain (default 1).</li></ul><h2 id="Example"><a class="docs-heading-anchor" href="#Example">Example</a><a id="Example-1"></a><a class="docs-heading-anchor-permalink" href="#Example" title="Permalink"></a></h2><p>Evaluating the fourth moment of a matrix entry <span>$|U_{11}|^4$</span>:</p><pre><code class="language-julia hljs">@variables d
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